hive-forge: #[must_use] on Client::repo (mara@#407)

hive-forge/src/client.rs

@@ -66,6 +66,7 @@ impl Client {
     /// Return the active repo. `from_env` already folded the
     /// `-r/--repo` override into `default_repo`, so verbs just read
     /// it as-is — no per-verb override plumbing.
+    #[must_use]
     pub fn repo(&self) -> &str {
         &self.default_repo
     }